In this guide
This article explains the treatment objective, the design information that matters and the operating checks that help keep the system practical after installation.
They work differently
UV exposes microorganisms to ultraviolet light and does not create a lasting disinfectant residual in the distribution system. Chlorine can leave a measurable residual but introduces chemical dosing and depends strongly on water chemistry.
Pretreatment affects both options
High turbidity and particles can shield microorganisms from UV, while chlorine demand can rise when reactive substances are present. The upstream treatment train should therefore create suitable feed conditions for whichever disinfection method is selected.
Choose for the complete system
Storage time, distribution length, operator capability, chemical handling, power reliability and monitoring requirements all influence the choice. In some systems multiple barriers are used when the risk and application justify them.
Need a treatment recommendation for your water?
Send the water source, intended use, approximate demand and any available test report. Waterwise Bangladesh can review the requirement and discuss an appropriate treatment approach.